World's largest Christmas store.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

The Cape Cod house that whaling built.

The largest glacial erratic boulder on Cape Cod.

The world's largest Holstein cow.

One man's quest to save his town with a trail of record-breaking sculptures.

A reproduction of earth's many biomes.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

When ecosystems collide in the arid Southwest.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

This iconic science fiction house still looks like something from the future.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The largest source of fossilized insects anywhere.

The highest bridge in America was built for an almost unnervingly small amount of money.